On the effect of the carbonaceous substrate in the nucleation of Sn nanoparticles for Li-ion anodes: experiments and first principles calculations |
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| Authors: | Sacha Smrekar Martin E. Zoloff Michoff Jorge E. Thomas Cecilia A. Calderón Lucas M. Farigliano Arnaldo Visintin Ezequiel P. M. Leiva Daniel E. Barraco |
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| Affiliation: | 1.Instituto de Física Enrique Gaviola (IFEG),CONICET,Córdoba,Argentina;2.INFIQC, CONICET and Departamento de Química Teórica y Computacional, Facultad de Ciencias Químicas,Universidad Nacional de Córdoba,Córdoba,Argentina;3.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas,Universidad Nacional de La Plata, CCT La Plata-CONICET,La Plata,Argentina;4.Facultad de Matemática, Astronomía, Física y Computación,Universidad Nacional de Córdoba,Córdoba,Argentina |
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| Abstract: | The nucleation of Sn nanoparticles by chemical reduction was studied using three different carbonaceous substrates, to obtain Sn/C composites. When used as active materials in anodes for lithium-ion batteries, these composites displayed higher capacities than commercially used graphite, and showed a good cyclability. The differences in morphology, capacity, cyclability, and diffusion between the resulting materials are highlighted. The resulting materials were characterized by charge-discharge cycling, voltammetry, EIS, SEM, and TEM microscopy. It was found that the substrate has a determinant effect on the deposition of Sn. This effect is interpreted in terms of the relative adsorption energies of a single Sn atom obtained from DFT calculations. |
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